Method of manufacturing separable fastener devices



May 2-6, 1936.. D. MARINISKY METHOD OF MANUFACTURING SEPARABLE FASTENER DEVIC Filed March 16, 1935 2 Sheets-Sheet l IN VEN T0 R. 041 /0 MAMV/YJK/ A TTORN May 26, 1936. D. MARINSKY METHOD OF MANUFACTURING SEPABABLE FASTENER DEVICES Filed March 16, 1935 2 Sheets-Sheet 2 INVENTOR. D4 V/Q Mwa/vovry ATTORNEY Patented May" 26, 1936 METHOD OF MANUFACTURING SEPARABLE FASTENER DEVICES Davis Marinsky, New York, N. Y., assignon' by mes ne assignments, to Whitehall Patents Corporation, New York, N. Y., a corporation of New York Application March 16, 1933, Serial No. 661,099

' 21 Claims.

This invention relates to what are known as separable fastener devices employing stringers having coupling links or elements disposed and I spaced longitudinally of their edges and interlocking with each other in coupling and uncoupling the stringers; and the object of the invention is to provide a method of forming and mounting the coupling elements in spaced relation on a suitable supporting strand, strip or body in the production of said separable fasteners, and especially a' method involving a successive series of forming operations consisting in molding or casting the coupling elements directly upon the supporting strand, strip or body by what may be termed die casting or molding, and to intermittently feed a cast coupling element and the supporting body upon which the same is mounted, out of position with the molding dies or members to permit the next successive cast or mold; a further object being to provide a core forming element which is utilized as a feeding and spacing means; a further object being to provide means for piercing or otherwise forming the supporting tape, strand or body of the stringer toprovide means for anchoring the coupling elements cast or molded thereon; a further object being to provide means for frictionally or otherwise supporting tlie workpiece in the operation of forming the successive links or coupling elements thereon; a further object being to provide means for cooling the dies or molds to eliminate excessive heating or burning of a supporting strip or strand, especially when composed of fibrous material; a. still further object being to provide a method of the class described involving a receptacle containing the molten material with means, for moving the receptacle toward and from the dies or molds and for discharging the molten material into said dies or molds; and with these and other objects in view, the invention consists in the method of forming fastening devices of the class under coni sideration, which is more fully hereinafter described and claimed. s i The invention is fullydisclosed in the following specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters, and in which:

Fig. 1 is a diagrammatic view showing one step in the process of forming a fastener stringer, just prior to the molding operation.

Fig. 2 is a similar view, showing the parts during a molding operation.

Fig. 3 is a view similar to Figs. 1 and 2, omitting part of the construction and showing the step immediately after the molding operation.

Figs. 4 and 5 are views similar to Fig. 3, showing the next successive steps in the operation of forming the stringers.

Fig. 6 is an enlarged, sectional view through one of the molded links arranged on the tape in the manner illustrated in Figs. 1 to 5 inclusive, and showing the means of anchoring the link to the tape.

Fig. 'l is a side and sectional view of a tape showing one linkthereon and showing a modification.

Fig. 8 is a perspective view of a modified form of stringer that I may produce.

Fig. 9 is a detail view of a part of a stringer showing the spacing of groups of coupling elements; and, l

Fig. 10 is a detail view of a pair of stringers diagrammatically illustrating the method of coupling and uncoupling the same.

Heretofore, in the construction of what are known as separable fasteners or devices of this class involving a pair of stringers having arranged longitudinally at one edge thereof interengaging coupling elements for coupling and uncoupling the stringers and the numerous devices or garment parts to which the stringers or coupling elements are attached, it has been customary to form the coupling elements of metal .stampings having spaced jaws which were feel onto a mounting tape and then crimped or compressed onto'the tape, or to form said elements from independent wire link members having end. portions which would wraparound a mounting strand or tape or which pierce the tape in coupling the ends of the wire links thereto, and still further, in the formation of a continuous coil of wire which is fed through a mounting tape, in all of which cases, it was first essential to preform. the wire or metal or partially preform the same, and then apply it to a tape or other strand.

It is the purpose of my present invention to obviate and eliminate these old methods of procedure, and to eliminate the added cost occasioned thereby, especially in first preforming' the raw material to a desired contour or cross sec:- tional form; such for example, as in first forming the wire from which the wire type fasteners were produced, or in first shaping or rolling the strips of metal from which the stampings are formed, and to take the crude or raw material which is in a molten state and to shape it directly upon the mounting strip, tape or other supporting body. In the following specification and claims, where reference is made to molten material or molding and casting materiaL-it will be understood that this is to include any ldnd or class of metal that may be found suitable for forming be apparent that the form, contour or design of the separate coupling elements as well as the size thereof may be varied to suit the fancies of the customer or consumer.

To fllustrate one manner of carrying my improved method into effect, I have shown in Figs. 1 to 5 inclusive what may be regarded as the successive series of steps of forming the successive coupling elements in one cycle of operation of the machine-parts or elements.

In these figures, I have shown oppositely disposed dies or molds l I and I2, each having a bore II in which is disposed a pipe It for introduction of a cooling fluid into the die to cool the same. The adJacent faces of the dies are recessed as seen at Ila, I 2a, to produce the desired molded element or link when said faces of the diesv are brought together as indicated in Fig. 2, the dim having recesses lib and l2b to receive a core piece and feed member I5, and other recesses I I0 and lie to receive the nozzle l6 through which.

molding material or casting material is inserted into the recesses Ila and I211. The die l2 carries a needle-like pin .I I adapted to enter an apertured lug I I in the die II and to pass through a mounting strip or tape I! to form openings 2| therein as is indicated in Fig. 1. In Fig. 1, I have shown at 2| a number of coupling links or elements secured to the strip I! and formed by the mold recesses Ila, In of the dies II and I2, with the last formed coupling element disposed below and out of the path of the dies II and l2,.the strip II with the coupling elements thereon being supported in position by oppositely disposed friction blocks 22 as clearly seen in Fig. 1.

At 23, I have shown a melting pot containing suitable molten material as indicated at 24, and the pot 23 is slidably mounted on guide rails 2| by means of suitable rollers or wheels 28 to permit movement of the pot 23, including the nozzle It, toward and from the dies II and I2. The nozzle I6 is coupled with and forms'a continuation of a goose neck 21, the free end 21a of which extends upwardly and protrudesthrough the top of the pot 22. to form a pump cylinder in which a piston 28 is movably mounted above and below an admission port 21b formed in'the cylinder 21a so that when the piston 22 is in raised position as shown in Fig. 1, the molten material 24 will enter the goose neck 21 through the port 21b and assume in the goose neck a level consistent with the level of the material 24 in the pot 22. At thistime, it will be understood that the nozzle l8 and especially the discharge end thereof is at all times above the level of the molten material 24 in the pot. It will thus appear that when the piston 2| descends in the cylinder 21a below the port 21b, the molten material in the goose neck 21 will be forced out through the nozzle l6 and into the recesses Ila, Ila of the dies to mold or cast the elements 2|, and this position of the parts is shown in Fig. 2 of the drawings. It will be understood that the potflwillbeheatedinanydesiredmannerto maintain the material 24 in proper fluid state to permit the formation of the castings orv moldings. At 29, I have indicated at the bottom of the not 23, a suitable heating unit which may be electrical. In dotted lines, I have indicated at 30 in Fig. 1, a housing enclosing the nozzle I6 which may contain an electric or other heating unit for maintaining the nozzle in heated state at all times, the tip end only of the nozzle being exposed for insertion into'the recesses Ilc, l2c of the dies. The heating unit 30 is omitted from Figs. 2 to 5 inclusive for sake of simplicity, it being understood that these features of the apparatus in themselves form no direct part of my invention and will be consistent with the customary practice in molding or casting apparatus of the class under consideration. The heating units and the method of constructing the same as well as the method of constructing the melting pot 23 and its insulation will be made to suit the particular types and kinds of casting and molding material employed.

In the construction shown, the contour of the recesses Ila, l2a in the dies II and I2 is such as to form elongated coupling elements 2|, the ends of which protrude beyond the strip is, having on their lower faces projecting rectangular knobs or beads 2la, note Fig. 3; and the upper faces of said protruding ends of the coupling elements have in vertical alinement with the knobs or beads 2Ia corresponding and slightly larger recesses 21b which are formed by the core and feed member I! and are adapted to receive the knobs 2Ia on the coupling elements 2| of a companion stringer in coupling and uncoupling the stringers in the manner indicated in Fig. 10 of the drawings. At this time, it will be apparent that the contour of the coupling elements 2i as well as that of the knobs or beads 2la and recesses 2Ib may be modified to suit the fancies of a manufacturer and/or consumer, and by virtue of the molding and casting process herein disclosed, it will be apparent that various designs, imprints and other characteristics of ornamentation or advertising may be incorporated in the coupling elements by simply constructing the dies accordingly, and for the sake of simplicity, a simple form of coupling element is disclosed.

In Fig. 6 of the drawings, it will appear that the openings 22 are formed by piercing the strip. is

with the pin I! which operates to spread the fibres or threads of the strip I. if the same is of such structure. In casting or molding the elements 2 I the molding material will cast or mold a binding portion 2 le through the apertures or openings 20 as seen in Fig. 6 to securely retain the elements 2i against displacement from the strip, it being also understood, however, that the-cast or molded material will impregnate the fibre of the strip and be securely bound thereto.

In this connection, attention is directed to the fact that in molding hot, molten metal upon the strip, there will be no danger of scorching a fibre strip by reason of the well'known fact that the heat of the cast or molded metal will immediately flow to the cool metals of the dies II and I2 and be absorbed thereby, and this operation is assured through the relatively fast series of molding operations which would necessarily be provided in the production of my improved product by the introduction of the cooling medium or fiuid'to the dies through the pipes I4 and the bores IS in the dies. It will also be understood thatthe elements II may be molded or cast on supporting strips, strands or bodies of any kind or class, and in ill some instances, may include metallic strips, 76

. strands or bodies. For example, in Fig. 8 of the drawings, I have shown coupling elements 2| similar to thoseshown in Figs. 1 to inclusive molded or, cast upon a cord, wire, cable or the like i911 which forms the stringer, or at least part of the stringer of a coupling element of the class under consideration.

In forming coupling stringers of the class under consideration, it is a common practice to form a plurality of groups of coupling elements on the supporting strip or strand and to space one group of elements from another to form the independent stringers by severing the strip or strand intermediate said groups. In Fig. 9 of the drawings, I have indicated at liib, the space on the strip l9 between two groups :c and m2 of the coupling elements 2 it being understood that the stringers are produced for commercial use in different lengths to suit various types and kinds of merchandise, and in production, the desired and predetermined inch length requirement of the coupling elements will be formed in the respective groups at, :02 and then spaced apart as lndicatedat lab for the purposes stated.

In Fig. of the drawings, I have diagrammatically illustrated ate one stringer and at 0.2 a companion stringer coupled and uncoupled with the stringer a through a slider b of conventional or any desired form and construction which slidably engages the coupling elements 2| of the stringers to couple and uncouple the same, and at c I have indicated a finger piece or pull, by means of which the slider b may be moved longitudinally of the stringers. i

In Fig. '7 of the drawings, I have shown a slight modification wherein the core and feed member it includes a protruding. tapered tongue lid on the lower face thereof, which forms in the coupling element 2| a supplemental recess 2 Id below the. recess Zlb and as a continuation thereof. The purpose of this modification would be primarily to reduce the amount of material employed in molding each-link or coupling element 2|, without in any way affecting the strength of the coupling element. This feature may, however, also beincluded to modify the form and contour of the interengaging portions of the links of separate stringers.

The successive steps in each cycle of operation of the machineelements diagrammatically disclosed for producing the molded or cast coupling elements 2|, will be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following statement.

advanced, and the dies ii and I! have been brought together under pressure with the perforated strip 18 between the dies with-the core l5 disposed in the recesses lib, |2b and with the nozzle IS in the recesses llc, I20. The instant.

that the parts are brought together in the position shown in Fig. 2. theplunger or piston 28 is moved downwardly into the position shown in Fig. 2, to force the'molten material 24 into the recesses ila, in of the dies to cast or mold one of the coupling elements 2|. Immediately after the casting has been formed, the dies ii and ii are moved in opposite directions away fromthe resulting casting and the nozzle l8 including the pct 23 is moved outwardly, the result of which will leave the parts in the position shown in Fig. 3 with the last formed coupling element 2| disposed on the lower end of the core and feed member lb.

The next step in the operation consists in moving the member i5 downwardly after releasing the friction blocks 22 from the strip i9 and to again move the dies ii and i2 inwardly to such position as to dispose the inner ends of the dies over the side edge portions of the last formed coupling link, which has been moved by the member it into a position below the lower surfaces oi the dies as clearly seen in Fig. 4 of the drawings, after which the member i5 is moved upwardly as shown in Fig. 5, in which operation, the last formed coupling element is brought into firm engagement with the lower surfaces of the die, and the friction blocks 22 are again moved into position to engage and support the strip is to retain said strip with the coupling elements thereon against movement, and as will be apparent, the core i5 is released from the recess 2 lb of the last formed couplingelement. In raising said mem-, ber it is returned into the position shown in Fig. 1, after which'the dies ii and .I2 are also returned into the position shown in Fig.1.

During the foregoing steps in the operation.

as illustrated in Figs. 3, 4 and 5 and back to Fig;

1, the pot 23 and nozzle i8 thereof remain stationary, it being understood that after the piston 28 has forced the molding material into the die as shown in Fig. 2, it will immediately return to the position shown in Fig. 1, in which operation the piston will suck the molding material contained in the nozzle inwardly to expose the same to the material within the pot through the passage 21b, which is then open, thus preventing any clogging of material in the discharge end of the nozzle it. It will also be apparent that in the inward movement of the dies as shown in Figs. 4 and 5 of the drawings, a second hole 20 will be partially formed in the strip l9 above the ment of the dies as shown in Fig. 2 of the drawings. It will be further apparent that the moveimparted thereto. The blocks 22 merely serve to support the strip Iii with the elements 2| thereon intermittently in fixed position, the spacing as at lsb'being accomplished by an independent feed as is common in other apparatus of the class under consideration, or in fact, this strip may be fed to provide the space IN) by hand. V

In the use of some metals in forming the castings it may be found necessary and desirable to treat fibrous supporting strips, strands or bodies with a material which will render the same subfirst hole formed therein by the inward move- 7 stantially fire or flame proof to prevent burning.

scorching or other breaking down of the fibre of the strip or supporting body where the coupling element is attached thereto. However, I have found in practice that in using a molding material composed of zinc or a composition containing a fairly large percentage of zinc, no

scorching or burning of a fibrous body will be experienced, bearing in'mind the fact that the I have diagrammatically illustrated certain forms of dies and other elements in carrying my improved method into eiIect and have illustrated the specific forms of coupling elements, my invention is not limited in these respects, nor am 1 limited to the specific steps of the method herein disclosed nor to the use of any particular type or kind of molding or casting material, and various other changes in and modifications of the .construction herein shown and described may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The herein described method of forming stringers of separable fasteners of the class described, which consists in arranging one edge only of a mounting strip or body between adjacent surfaces of opposeddie parts, moving said die parts together into abutting relation and into engagement with said edge or the strip, introducing a molding material into the mold recesses of the dies andupon a portion of the strip disposed between the dies to form at a predetermined point on the strip, a coupling element having an interlocking portion protruding beyond one side edge of the strip.

2. The herein described method of forming stringers of separable fasteners of the class described, which consists in arranging one edge only of a mounting strip or body between adjacent surfaces of opposed die parts, moving said die parts together into abutting relation and into engagement with said edge of the strip, introducing a molding material into the mold recesses of the dies and upon a portion of the strip disposed between the dies to form at a predetermined point on the strip, a coupling element having an interlocking portion protruding beyond one side edge of the strip, and forming on opposed surfaces of the interlocking portions of said coupling elements, protruding members and recesses to provide interlocking engagement of one stringer with a companion stringer.

3. The herein described method of forming stringers of separable fasteners of the class described, which consists in arranging a mounting strip or body between adjacent surfaces of opposed die parts, moving said die parts together into abutting relation and into engagement with said strip, introducing a molding material into the mold recesses of the dies and upon a portion of the strip disposed between the dies to form at a predetermined point on the strip a coupling element having an interlocking portion protruding beyond one side edge of the strip, forming on opposed surfaces of the interlocking portions of said coupling element, protruding members and recesses to provide interlocking engagement of one stringer with a companion stringer, the recesses in said coupling elements being formed by a core member independent of the die parts and by. means of which a formed coupling element is moved out of engagement with the die parts when separated, and the strip positioned to receive another molded coupling element spaced a predetermined distance from the first element. g,

4. The herein described method of forming stringers of separable fasteners of the class described, which consists in arranging a mounting strip or body between adjacent surfaces of opposed die parts, moving said die parts together into abutting relation and into engagement with said strip, introducing a molding material into .the mold recesses of the dies and upon a portion of the strip disposed between the dies to form at a predetermined point on the strip a coupling element having an interlocking portion protruding beyond one side edge of the strip. forming on opposed surfaces of the interlocking portions of said coupling element protruding members and recesses to provide interlocking engagement of one stringer with a companion stringer, the recesses in said coupling elements being formed by a core member independent of the die parts and by means of which a formed coupling element is moved out of engagement with the die parts when separated and the strip positioned to receive another molded coupling element spaced a predetermined distance from the first element, and detaching the core member from a formed coupling element with said coupling element retained in predetermined position.

5. The herein described method of forming stringers of separable fasteners of the class described, which consists in arranging a mounting strip or body between adjacent surfaces of opposed die parts, moving said die parts together into abutting relation and into engagement with said strip, introducing a molding material into the mold recesses of the dies and upon a portion of the strip disposed between the dies to form at a predetermined point on the strip a coupling element having an interlocking portion protruding beyond one side edge of the strip, forming on opposed surfaces of the interlocking portion of said coupling element protruding members and recesses to provide interlocking engagement of one stringer with a companion'stringer, the recesses in said coupling elements being formed by a core member independent of the die parts and by means of which a formed coupling element is moved out of engagement with the die parts when separated and the strip positioned to receive another molded coupling element spaced a predetermined distance from the first element, detaching the core member from a formed coupling element with said element retained in predetermined'position, and supporting said strip and coupling elements against movement after disengaging the core member from a formed element and prior to molding an adjacent element-on-the strip.

6. The herein described method of forming stringers of separable fasteners 01' the class described, which consists in arranging a mounting strip or body between adjacent surfaces of opposed die parts, moving said die parts together into abutting relation and into engagement with said strip, introducing a molding material into the mold recesses of the dies and upon a portion of the strip disposed between the dies to form at a predetermined point on the strip a coupling element having an interlocking portion protruding beyond one side edge of the strip, forming on opposed surfaces of the interlocking portion of said coupling element protruding members and recesses to provide interlocking engagement of one stringer with a companion stringer,

the recesses in said coupling elements being formed by a core member independent of the die parts and by means of which a formed coupling element is moved out of engagement with the die parts when separated and the strip positioned to receive another molded coupling element spaced a predetermined distance from the first element, detaching the core member from a formed coupling element with said coupling element retained in predetermined position, supporting said strip and coupling elements against movement after disengaging the core member from a formed element and prior to molding an adjacent element on the strip, and forming apertures in the strip at spaced intervals and in alinement with that part of the coupling elements to be mounted on the strip to-provide a binding between the partsof the molded coupling elements on the strip.

7. The herein described method of forming stringers of separable fasteners of the class described, which consists in arranging a mounting strip or body between adjacent surfaces of opposed-die parts, moving said die parts together into abutting relation and into engagement with said strip, introducing a molding material into the mold recesses of the dies and upon a portion of the strip disposed between the dies to form at a predetermined point on the strip a coupling element having an interlocking portion protruding beyond one side edge of the strip,- i'orming on opposed surfaces of the interlocking portion of said coupling element protruding members and recesses to provide interlocking engagement of one stringer with a companion stringer, the recesses in said coupling elements being formed by a core member independent of the die parts and by means of which a formed coupling element is moved out of engagement with the die parts when separated and the strip positioned to receive another molded coupling element spaced a predetermined distance from the first element, detaching the core. member from a formed coupling element with said coupling element retained in predetermined position, sup- ,porting said strip and coupling elements against movement after disengaging the core member from a formed element and prior to molding an adjacent element on the strip, forming apertures in the strip at spaced intervals and in alinement with that part of the coupling elements to be mounted on the strip to provide a binding between the parts of the molded'coupling elements on the strip, and moving the means for injecting the molding material into the dies toward and from the dies during the successive molding operations.

8. The herein described method of manufacturing a stringer of separable fasteners ofthe class described, which consists in. intermittently moving die parts toward and from each other to form a series of moldings or castings of predetermined contour, said moldings or castings forming the coupling elements of a stringer, molding said successive series of coupling elements at eoually spaced intervals onto a supporting body or the stringer with the coupling portions of said elements protruding from said body, successively forming the coupling elements on a core member disposed between the dies, and utilizing said member as a feed to feed the formed element out of engagement with the dies and to'space said element a predetermined distance from the next element to be molded on said body.

9. The herein described method of manufacturing a stringer of separable fasteners of the class described, which consists in intermittently moving die parts toward and from each other to form a series of moldings or castings of predetermined contour, said moldings or castings form- .ing the'coupling elements of a stringer, molding said successive series of coupling elements at equally spaced intervals onto a supporting body of the stringer with the coupling portions of said elements protruding from said body, successively forming the coupling elements on a core member disposed between the dies and utilizing said member as a feed to feed the formed element out of engagement with the dies and to space said element a predetermined distance from the next element to be molded on said body, and

moving a nozzle through which the molding material is injected into the dies toward and from said dies in the successive series of molding operations.

10. The herein described method of manufacturing. 'a stringer of separable fasteners of the class described, which consists in intermittently moving die parts toward and from each other to form a series of moldings or castings'of predetermined contour, said moldings or castings forming .the coupling elements of a stringer, molding said successive series of coupling elements at equally spaced intervals onto a supporting body of the stringer with the coupling portions of said elements protruding from said body, successively forming the coupling elements on a core member disposed between the dies and utilizing said member as a feed to feed the formed element out of engagement with the dies and to space said element a predetermined distance from the next element to be molded on said body, moving a nozzle through which thernolding material is injected into the dies toward and from said dies in the successive series of molding operations, and forcing the molded material through the said nozzle into the dies under pressure.

11. Theimethod of manufacturing a fastener.

device, comprising an elongated supporting body having a plurality of coupling elements arranged and spaced longitudinally of one edge of said body with the coupling parts of said elements protruding beyond said edge, which consists in moving dies for molding said coupling elements toward and from opposed sides of said supporting body and introducing molding material into the dies under pressure to form said elements when said dies are held in firm engagement with each other and with said supporting body, and moving the formed coupling elements by a forming member out of engagement'withthe dies when separated to position an adjacent part of the supporting body between the dies to permit the next successive molding operation.

12. The method of manufacturing a fastener device, comprising an elongated supporting body supporting body between the dies to permit the next successive molding operation, and shaping the supporting body to provide for the formation of anchoring or keying means on said molded element for binding the elements on and retaining the same against displacement from said supporting body.

13. The method of manufacturing. a fastener device comprising an elongated supporting body having a plurality of coupling elements arranged and spaced longitudinally of one edge of said body with the coupling parts of said elements protruding beyond said edge, which consists in intermittently moving coupling element forming dies toward and from opposite side faces of the supporting body and a core forming member disposed in alinement with said body and in the path of said dies, supporting said dies in firm engagement with each other and with said supment out of alinement with the mold recesses of the dies and to position another part of the supporting body between the dies to receive the next adjacent coupling element, and then disengaging the core member from the formed element, and retaining said formed element and the supporting body in predetermined spaced position in the disengagement of said core member.

14. The method of manufacturing a fastener device comprising an elongated supporting body having a plurality of coupling elements arranged and spaced longitudinally of one edge of said body with the coupling parts of said elements protruding beyond said edge, which consists in intermittently moving coupling element forming dies toward and from opposite side faces of the supporting body and a core forming member disposed in alinement with said body and in the path of said dies, supporting said dies in firm engagement with each other and with said supporting body and core member to form between the dies and around said body and member a mold chamber, introducing molding material into said mold chamber under pressure to form a coupling element supported on said core member, then separating the dies and operating the core member to move the formed coupling element out of alinement with the mold recesses of the dies and to position another part of the supporting body between the dies to receive the next adjacent coupling element, then disengaging the core member from the formed element and retaining said formed element and the supporting body in predetermined spaced position in the disengagement ofsaid core member, and forming apertures in that part of the supporting body in connection with which the coupling elements are molded to provide a binder of the molded element through said body.

15. The method of manufacturing a fastener device comprising an elongated supporting body path of said dies,- supporting said dies in firm engagement with each other and with said supporting body and core member to form between the dies and around said body and member a mold chamber, introducing molding material into said mold chamber under pressure to form a coupling element supported on said core member, then separating the dies and operating the core member to move the formed coupling element out of alinement with the mold recesses of the dies and to position another part of the supporting body between the dies to receive the next adjacent coupling element, then disengaging the core member from the formed element and retaining said formed element and the supporting body in predetermined spaced position in the disengagement of said core member, and coolingthe dies to provide quick chilling of the molded coupling elements on said body.

16. The herein described method of forming stringers of separable fasteners 01' the class described which consists in arranging a mounting strip or body between adjacent surfaces of opposed-die parts having mold chambers between saidsurfaces in which one edge portion of the mounting strip is arranged, another die part arranged in the plane of said strip and between adjacent surfaces of the first die parts and movable relatively thereto, moving said first named die parts together into abutting relation and into engagement with said strip and the last named die part, and introducing molding material into the mold chambers of the dies to form on that part of the strip within the chambers of said dies a coupling element having an interlocking portion protruding beyond one edge of the strip.

1'1. The herein described method of forming stringers of separable fasteners of the class described which consists in arranging a mounting strip or body between adjacent surfaces of opposed die parts having mold chambers between said surfaces in which one edge portion oi. the mounting strip is arranged, another die part arranged in the plane of said strip and between adjacent surfaces of the first die parts and movable relatively thereto, moving said first named die parts together into abutting relation and into engagement with said strip and the last named die part, introducing molding material into the mold chambers of the dies to form on that part of the strip within the chambers of said dies 9. coupling element having an interlocking portion protruding beyond one edge of the strip and separating said first named die parts and feeding the formed element and said strip by the second named die part to position and space the strip to receive the next successive molded link, and then removing the second named die part from the formed element.

18. The herein described method of forming a series of coupling links on a mounting strand to produce a separable fastener of the class described which consists in utilizing three forming members, two of which are movable toward and from each other and said mounting strand in one plane, and the other member being movable angularly with respect to the first named members, said members when brought together forming around and beyond one edge portion oi. the mounting strand a mold chamber, and introducing molding material into said chamber to form therein a coupling link on said strand, the protruding portion of which includes on one side face a projecting member and on the opposite side nozzle intermediate said dies with the discharge end thereof opening directly into the mold chamber of the dies and discharging casting material from the nozzle into the mold chamber of the dies under pressure so as to form on the edge of the mounting strip within said chamber and atthe end of the nozzle a link of said stringer.

20. The method as defined in claim 19 including the step of first treating the mounting strip of the stringer to render the same substantially flame-proof before casting the links thereon.

21. The method of forming die cast coupling -links of fastener stringers of the class described which consists in moving dies toward and from each other and the mounting strip of a stringer disposed therebetween with one edge extending into the mold chamber of the dies, arranging a nozzle intermediate said dies 'with the discharge end thereof opening directly into the mold chamber of the dies and discharging casting material from the nozzle into the mold chamber of the dies under pressure so as to form on the edge of the mounting strip within said chamber and at the end of the nozzle a link of said stringer, disposing a forming element between adjacent surfaces of the dies and extending into the mold chamber thereof to form on one surface of the 15 link outwardly of said strip a recess.

DAVIS MARINSKY. 

